Can't move files from internal storage to SD card

I have a Galaxy Tab A 10.1 (2016). I want to move files to the SD card to free up internal memory. I tried using the Samsung Simulator to get the steps needed to transfer files. When it gets to the step to click "More Options", a window saying that briefly appears but nothing happens when I press it - it just goes away.

The App Drawer is your list of all installed apps. Tap the icon in the bottom row that looks like a circle (or square) with a grid of dots in it. Now look in the App Drawer for My Files. Since you have a Samsung device, My Files might be in the Samsung folder in the App Drawer.